Hmm, I don't know really. Primarily because I don't know how much the rules Steem currently operates on can be changed.
If I could do something I'd definitely do a revision of the flagging system first. It is simply begging for abuse. The basic premise behind it is that everyone is nice, plays fair and has the best interests of Steem at heart... extremely naive and dangerous I'd say. It's almost like China's "cultural revolution" begging to happen.

As for rewards which are dependent on the size of benefactor's steem holdings, which is the core principle of Steem economy... I really don't know. Virtual currency systems are difficult to design, almost as much as real world ones. Irreversible capital accumulation at the top is a real concern. Longterm it can be devastating for the greater majority of participants.. who can then simply leave. There is no Iron Curtain keeping SteemIt users in once they realize that no real money is going to come their way since the whales have better ways to invest than in some reputation 25s. I dunno.. taxation, limits on vote weight proportional to account size, UBI? All of those are also very open to abuse and the greedy will find a way to circumvent and even profit off them... not to mention that it would go against the idea of truly free economy.

Perhaps the best way would be to introduce some kind of subtle mechanic which would make it proportionally more profitable to vote up minnows than whales. I still don't know what that would be but I have a hunch that the solution might lay somewhere in that direction.